微观粒子在周期势场中的运动是量子力学和固体物理教学中都会涉及到的重要内容.本文基于缺陷Dirac梳模型，研究了波包在周期势场中发生散射的能谱结构以及典型特点，可作为量子力学教学内容的延伸，以帮助学生在后续固体物理的学习中建立清晰的物理图像.

The motion of microscopic particle in a periodic potential is an important content in the teaching of quantum mechanics and solid state physics. Based on the defective Dirac comb model, this paper studies the energy spectrum structure and typical characteristics of the wave packet scattering in the periodic potential, which can be used as an extension content in the teaching of quantum mechanics, so as to help students establish clear physical picture in the subsequent study of solid state physics.